Java tutorial
//package com.java2s; public class Main { static Throwable checkedException(Throwable ex) /* 46: */ { /* 47:144 */if ((ex != null) && (!(ex instanceof RuntimeException)) && (!(ex instanceof Error))) { /* 48:146 */return ex; /* 49: */} /* 50:148 */throw new IllegalArgumentException("Not a checked exception: " + ex); /* 51: */} }